College of Physics and Electronic Information & Henan Key Laboratory of Electromagnetic Transformation and Detection, Luoyang Normal University, Luoyang 471934, China.
College of Physics and Electronic Information & Henan Key Laboratory of Electromagnetic Transformation and Detection, Luoyang Normal University, Luoyang 471934, China; College of Physics Science and Technology, Nanjing Normal University, Nanjing 210023, China.
Ultrason Sonochem. 2022 Nov;90:106189. doi: 10.1016/j.ultsonch.2022.106189. Epub 2022 Oct 4.
Ultrasound can accelerate and change the reaction process and is widely used in the field of hydrogen production and storage. In this study, ultrasound (US) and AlOOH suspension (AH) are used to promote hydrogen production from Al hydrolysis. The results indicate that both US and AH greatly shorten the induction time and enhance the hydrogen production rate and yield. The promoting effect of US and AH on Al hydrolysis originates from the acoustic cavitation effect and catalytic effect, respectively. When AH is used in combination with US, Al hydrolysis has the best hydrogen production performance and the hydrogen yield can reach 96.6 % within 1.2 h, because there is a synergistic effect on Al hydrolysis between AH and US. Mechanism analyses reveal that the micro-jets and local high temperature environment arising from acoustic cavitation improve the catalytic activity of AlOOH, while the suspended AlOOH particles enhance the cavitation effect of US. This work provides a novel and feasible method to promote hydrogen production from Al hydrolysis.
超声可以加速和改变反应过程，在制氢和储氢领域得到了广泛应用。在这项研究中，采用超声（US）和 AlOOH 悬浮液（AH）来促进 Al 水解制氢。结果表明，超声和 AlOOH 悬浮液均能大大缩短诱导时间，提高制氢速率和产率。超声和 AlOOH 悬浮液对 Al 水解的促进作用分别源于声空化效应和催化效应。当 AH 与 US 联合使用时，Al 水解具有最佳的制氢性能，在 1.2 h 内可达到 96.6%的氢气产率，因为 AH 和 US 之间对 Al 水解具有协同作用。机理分析表明，声空化产生的微射流和局部高温环境提高了 AlOOH 的催化活性，而悬浮的 AlOOH 颗粒增强了 US 的空化效应。这项工作为促进 Al 水解制氢提供了一种新颖且可行的方法。
